将项添加到ObservableColletion - UWP C＃

Question

当我尝试将项目添加到可观察集合时，它总是用最后添加的项目替换所有项目。它是什么原因？我的代码在这里

  public class FavoriteClassList
{
    public int ID { get; set; }
    public string Name { get; set; }
}
public static ObservableCollection<FavoriteClassList> _FavoriteClassList = new ObservableCollection<FavoriteClassList>();
FavoriteClassList objFavoriteClassList = new FavoriteClassList();

for (int m=1;m<=10;m++)
            {
              objFavoriteClassList.ID = m;
              objFavoriteClassList.Name  = "Name"+m;
             _FavoriteClassList.Add(objFavoriteClassList);
            }

现在，当打印AppGlobals._FavoriteClassList的值时，它显示10个项目。但每个项目的ID和名称分别为10和Name10。

Answer 1

您添加了一个对象10次并重写10次。这是一个固定版本：

public class FavoriteClassList
{
   public int ID { get; set; }
   public string Name { get; set; }
}
public static ObservableCollection<FavoriteClassList> _FavoriteClassList = new ObservableCollection<FavoriteClassList>();


for (int m=1;m<=10;m++)
{
   FavoriteClassList objFavoriteClassList = new FavoriteClassList();
   objFavoriteClassList.ID = m;
   objFavoriteClassList.Name  = "Name"+m;
   _FavoriteClassList.Add(objFavoriteClassList);
}